Your
Part of speech: pronoun
Definition: Belonging to you; of you; related to you (singular; one owner). Belonging to you; of you; related to you (plural; more owners).
Ur
Part of speech: interjection
Definition: Expressing hesitation or inarticulacy; er, um.
Part of speech: contraction
Definition: you're, you are
Part of speech: pronoun
Definition: your